^ sure, but why would we even spend trillions of dollars to get to Mars in the first place? I suppose some are bound to the idea that humans would one day grow out of Earth due to populational pressure or resource demands. That made a lot of sense in the 50s or the 70s, but now most developed countries have shrinking populations and energy requirements. So... *shrugs*
You could argue instead that is to ensure human survivability but on Mars, the soil is so toxic that it can't even be accurately simulated on Earth since it would be too hazardous to handle. The air is colder than Antarctica's and orders of magnitude drier. And the dust is so thin that it would get into sealed suits and habitats. I hope explorers enjoy breathing in the equivalent of asbestos with chlorine while taking the radiation equivalent of the worst spots of the Chernobyl exclusion zone.
Also, have I mentioned that in the Biosphere habitat experiments, the participants turned on each other, and some had critically low oxygen levels due to unforeseen design flaws? Imagine that happening for real...
